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PT Convertible lift cylinder hoses

 
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  #1 (permalink)  
Old 17 Apr 2013, 05:50 pm
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Default PT Convertible lift cylinder hoses

The short version - put a screw thru one of the hydraulic lines while re-mounting the AMP added to the Wifes car sometime in its past.

the bad - hoses not available from Chrysler

Can anyone point me in the direction of a used set of hoses, or a good aftermarket supplier.

I did find one company that can possibly make them

Scott
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Old 17 Apr 2013, 06:33 pm
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Default Re: PT Convertible lift cylinder hoses

Only thing that shows in the part catalog from chrysler

06 Conv Pump Assembly

5127344AB 497$ MSRP

357.60 at OE Discount parts directt (mopar dealer, free shipping no sales tax)

OE Discount Parts
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Old 17 Apr 2013, 07:10 pm
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Default Re: PT Convertible lift cylinder hoses

the local chrysler dealer wanted over $2200

We have a 2005 if that changes the part number
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Old 17 Apr 2013, 09:49 pm
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Default Re: PT Convertible lift cylinder hoses

I'd try to find someone local that can make them up . Hopefully will not cost a lot, but I'm not that familiar with system on my vert(yet , hopefully never..lol)

Let us know how it comes out
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Old 17 Apr 2013, 09:51 pm
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Default Re: PT Convertible lift cylinder hoses

Find a machine shop or a hydraulic shop that can either fix or create the hose.
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Old 17 Apr 2013, 10:00 pm
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Default Re: PT Convertible lift cylinder hoses

If the hoses are rigid nylon (not rubbery material) are a standard outside diameter, (exact fraction of an inch, or exact millimeter), you may be able to cut the line and install a commercial brass ferrule type union to reconnect the two ends.

If there are threaded pipe joints at each end, making a replacement hose that goes end to end out of the same manufacturer's catalog would also be an option. Automotive stores and plumbing stores sell low grade versions of the brass fittings, but perhaps not the plastic tubing. The industrial brands are Swagelok and Parker.
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Old 18 Apr 2013, 04:37 am
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Default Re: PT Convertible lift cylinder hoses

Being a hydraulics engineer, one would think that getting hoses made would be easy.

the hose material is Parker Polyflex 2010N working pressure of 20MPa (about 4900psi). The hose is not in the Polyflex Catalog (for America at least) The fittings used on the tops are custom (non parker catalog). This is a germany only custom hose assembly per Parker's Energy Division which handles the Polyflex hoses. (read as same source vender as mercedes). The tooling for crimping is not common since the hose is 2mm ID. I did manage to find the crimp sleaves in a parker catalog, however the distributor said the EX series of fittings is a special order with a 6 week lead time.

These are NOT threaded fittings, however o-ring tube fittings retained by a clip at the cylinder, and a screw at the pump. If they were threaded I would have had fittings and lines done in a heartbeat.

The only source I found for making hoses is a place in Washington state (Top Hydraulics Inc.) was quoted $110. The main technical person Klaus also makes hoses for Mercedes. The same custom fittings on the PT cruiser as are on the SLK 190 and 230 convertibles.

This would also explain why the oil smells like Pentosin (same as the fluids in my Audi)

So, if one custom way over-priced top hydraulic vendor can make them, there has to be another - right?

Hoping to find some place on this coast, preferably in the neighborhood of $50. otherwise it will be a complete new pump/motor/line system.
Chromenut likes this.

Last edited by Scott_Danforth; 18 Apr 2013 at 04:41 am.
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Old 18 Apr 2013, 06:47 am
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Default Re: PT Convertible lift cylinder hoses

There's a lot of interesting information in your last post. The best source of hoses may be a wrecked PT convertible. There aren't a lot of them around, but they do get wrecked, and there aren't a lot of failures from wear, so a used set should be possible to find.

This site has not seen a lot of informed discussion on this subject, so we are building a bit of data here. If you were able to take a couple of pictures while you are working this through, it may help others in the future?

As an aside, the actual working pressure in the system is probably closer to 50 PSI than 5000 PSI, if the hoses are flexible, a splice using an internal barb connector and clamps may be possible. If it were mine, I would prefer a pristine installation too, but we were discussing budget repairs, and an eventual high end repair will replace the area in question, so experimenting here should not do any harm
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Old 18 Apr 2013, 05:36 pm
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Default Re: PT Convertible lift cylinder hoses

Call a recycler

Chrysler PT Cruiser Convertible Top Lift | Used Auto Parts

In 05 PT Catalog same part # but AA Revsion 5127344AA
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Old 19 Apr 2013, 04:30 am
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Default Re: PT Convertible lift cylinder hoses

the power unit is actually a high pressure unit. just like other mercedes units. that way the cylinders can be small. I estimate 16mm bore on the cylinder which would take a bit of pressure to actuate the rod side.

there is no splicing the polyflex hose. its a true wire reinforced hydraulic hose.

the other interesting thing is that the HPU appears to have small flow control check valves based on the machining of the valve body. that would explain why both right and left sides are equal length.

I started down the path of searching for AN brake fittings to then modify by tig welding to the existing fittings. knowing I would have to make both sides equal, I started adding the cost......

next was to log onto car-part.com (used part search engine). and look for yards.

I did find 5 wrecked 'verts between 2 salvage yards. headed there on Saturday.

Last edited by Scott_Danforth; 19 Apr 2013 at 05:00 am.
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